The ties that bind and transform: knowledge remittances, relatedness and the direction of technical change
研究OECD国家中高技能移民（特别是发明家）如何通过知识汇款促进母国的技术多样化，发现其对发展中国家和与现有技术关联度低的技术领域影响更大，推动非关联多样化。
Abstract This study investigates whether high-skilled migration in a sample of OECD countries fosters technological diversification in the migrants’ countries of origin. We focus on migrant inventors and study their role as vectors of knowledge remittances. Further, we particularly analyze whether migrants spark related or unrelated diversification back home. To account for the uneven distribution of knowledge and migrants within the host countries, we break down the analysis at the metropolitan area level. Our results suggest that migrant inventors have a positive effect on the home countries’ technological diversification, particularly for developing countries and technologies with less related activities around—thus fostering unrelated diversification.